Originally Posted by Luna616
I had a almost 9 yr old Great Dane mix... put to sleep this past summer
A couple years ago, she pulled the leash out of my hands and went straight after a little dog ... picked him up, & shook him like a toy.
I ran over and pulled her collar till she released him ... unfortunately, the little dog died the next day, my Luna punctured his lung.
One of the fosters for Chessie ResQ of VA had a bad habit of thinking she 'knew the dog' after 3 to 5 days in her house; she had dogs of her own, watched how they reacted individually to the newcomer & how the newcomer reacted to each of them - she'd brush & handle any new intake all over, being careful not to push any buttons, in the 1st few days, & think that all was revealed.
A 3-YO F Chessie came in, the owner complained he "didn't have time for her", but reported no behavioral issues - she came with full vet records, no aggro noted anywhere.
She'd been in the house for a week, got along fine with all the dogs, no RG, zero arguments over space or pushing for attn, no conflicts whatever; the foster decided to take her along for a visit to her neighbor, who loved dogs.
The new arrival could heel off-leash, so she didn't even carry one
; all the dog wore was tag-collar & temp-tags.
Approaching the front door of the neighbor's house, they saw the elderly resident cat lying on a windowsill, asleep in the sun. The Chessie veered off, went thru the shrubbery to the sill, pulled her down, shook her 2 or 3 times, carried her to the foster's feet, & dropped her there, dead - then she went back to heel position, as if nothing had happened.
The foster took her belt out of her pants' loops, ran it under the dog's buckle collar & thru its own buckle, led her back home, crated her, & went back to pick up the corpse & explain what happened to her kitty.
U really can't assume
a dog has no aggro or predatory impulses - they can pop out unexpectedly.
Prevention beats apology every time, & a leash is the cheapest insurance ever for a dog. It doesn't prevent every instance, but WITHOUT a leash, the situation is probly not controllable, period. WITH a leash on, there's at least a chance to react & intervene.